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authorrogersb11 <brettrogers11@gmail.com>2015-11-10 11:19:31 -0600
committerrogersb11 <brettrogers11@gmail.com>2015-11-10 14:01:25 -0500
commitb4d16f70c34ecb908c8a61e58ea51fecdd4a4b10 (patch)
tree973e9aeb97bb13497d17a43e6f3c070381bc5b87 /include/linux/auto_fs.h
parentd177fbc2f0c263b06c18bda2eb46200a31bcbebd (diff)
parent5dba9ddd98cbc7ad319d687887981a0ea0062c75 (diff)
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Merge remote-tracking branch 'korg/linux-3.0.y' into cm-13.0
Conflicts: crypto/algapi.c drivers/gpu/drm/i915/i915_debugfs.c drivers/gpu/drm/i915/intel_display.c drivers/video/fbmem.c include/linux/nls.h kernel/cgroup.c kernel/signal.c kernel/timeconst.pl net/ipv4/ping.c Change-Id: I1f532925d1743df74d66bcdd6fc92f05c72ee0dd
Diffstat (limited to 'include/linux/auto_fs.h')
-rw-r--r--include/linux/auto_fs.h25
1 files changed, 8 insertions, 17 deletions
diff --git a/include/linux/auto_fs.h b/include/linux/auto_fs.h
index da64e15..6cdabb4 100644
--- a/include/linux/auto_fs.h
+++ b/include/linux/auto_fs.h
@@ -31,25 +31,16 @@
#define AUTOFS_MIN_PROTO_VERSION AUTOFS_PROTO_VERSION
/*
- * Architectures where both 32- and 64-bit binaries can be executed
- * on 64-bit kernels need this. This keeps the structure format
- * uniform, and makes sure the wait_queue_token isn't too big to be
- * passed back down to the kernel.
- *
- * This assumes that on these architectures:
- * mode 32 bit 64 bit
- * -------------------------
- * int 32 bit 32 bit
- * long 32 bit 64 bit
- *
- * If so, 32-bit user-space code should be backwards compatible.
+ * The wait_queue_token (autofs_wqt_t) is part of a structure which is passed
+ * back to the kernel via ioctl from userspace. On architectures where 32- and
+ * 64-bit userspace binaries can be executed it's important that the size of
+ * autofs_wqt_t stays constant between 32- and 64-bit Linux kernels so that we
+ * do not break the binary ABI interface by changing the structure size.
*/
-
-#if defined(__sparc__) || defined(__mips__) || defined(__x86_64__) \
- || defined(__powerpc__) || defined(__s390__)
-typedef unsigned int autofs_wqt_t;
-#else
+#if defined(__ia64__) || defined(__alpha__) /* pure 64bit architectures */
typedef unsigned long autofs_wqt_t;
+#else
+typedef unsigned int autofs_wqt_t;
#endif
/* Packet types */